BIO 345 (Evolution) Exam 4 Practice
Questions with Correct Answers
Which trait of humans is not shared by the LUCA? (cogbooks 6.1)
a. Nucleic acids as the material basis of inheritance
b. Eukaryotic cell structure
c. Metabolism uses l-isomers of proteins exclusively
d. The codons of the genetic code
e. Humans share all of the above traits with the LUCA - ✔✔b
You extract DNA from human bones in an ancient village buried by
volcanic ash. You discover that there is an extremely high frequency of the
LCT allele for lactase persistence. What might you conclude about the
population? (cogbooks 6.1)
1
100% Pass Guarantee Katelyn Whitman, All Rights
,a. This population is likely the source of the high frequency of the LCT
gene in Northern Europe.
b. The village could not be more than 4,500 years old.
c. The members of this population likely used domesticated livestock for
their milk.
d. The villagers had a diet rich in wheat or another domesticated crop.
e. The population could not have been under strong selection because the
gene was not fixed. - ✔✔c
According to the figure, which organism is the closest living relative to
humans? (cogbooks 6.1)
a. Bonobo
b. Gorilla
c. Bonobos and chimpanzees, equally
d. Gorillas and bonobos, equally
e. Chimpanzees - ✔✔c
2
100% Pass Guarantee Katelyn Whitman, All Rights
,Which genera is likely the most recent ancestor of the genus Homo?
(cogbooks 6.2)
a. Ardipithecus
b. Pan
c. Sahelanthropus
d. Australopithecus - ✔✔d
Which statement best explains why modern Europeans, Asians, or Africans
lack Denisovan DNA in their genome? (cogbooks 6.2)
a. Denisovans never interbred with any population of Homo sapiens.
b. Denisovans DNA was eliminated from those populations by strong
purifying selection.
c. Denisovans interbred only with the population whose ancestors are
Melanesians.
d. Neanderthal genes and Denisovan genes are incompatible, so modern
populations have one or the other. - ✔✔c
3
100% Pass Guarantee Katelyn Whitman, All Rights
, Which piece of evidence does not support the theory of recent (ca. 200,000
years ago) African origin of humans? (cogbooks 6.2)
a. Mitochondrial DNA sequences coalesce to Africa populations about
125,000 years ago.
b. Linkage disequilibrium of nuclear genes gets progressively lower as one
measures populations farther from Africa.
c. Haplotype diversity of nuclear genes is greatest in Africa
d. Fossils of modern humans older than 60,000 years are found only in
Africa.
e. Non-African populations show reduced heterozygosity compared to
African populations. - ✔✔b
Which statement is true? (lecture 22)
a. Tarsiers and lemurs are more closely related than tarsiers and new world
monkeys
b. Gibbons are more closely related to orangutans than humans
c. Gorillas are more closely related to orangutans than to humans
4
100% Pass Guarantee Katelyn Whitman, All Rights
Questions with Correct Answers
Which trait of humans is not shared by the LUCA? (cogbooks 6.1)
a. Nucleic acids as the material basis of inheritance
b. Eukaryotic cell structure
c. Metabolism uses l-isomers of proteins exclusively
d. The codons of the genetic code
e. Humans share all of the above traits with the LUCA - ✔✔b
You extract DNA from human bones in an ancient village buried by
volcanic ash. You discover that there is an extremely high frequency of the
LCT allele for lactase persistence. What might you conclude about the
population? (cogbooks 6.1)
1
100% Pass Guarantee Katelyn Whitman, All Rights
,a. This population is likely the source of the high frequency of the LCT
gene in Northern Europe.
b. The village could not be more than 4,500 years old.
c. The members of this population likely used domesticated livestock for
their milk.
d. The villagers had a diet rich in wheat or another domesticated crop.
e. The population could not have been under strong selection because the
gene was not fixed. - ✔✔c
According to the figure, which organism is the closest living relative to
humans? (cogbooks 6.1)
a. Bonobo
b. Gorilla
c. Bonobos and chimpanzees, equally
d. Gorillas and bonobos, equally
e. Chimpanzees - ✔✔c
2
100% Pass Guarantee Katelyn Whitman, All Rights
,Which genera is likely the most recent ancestor of the genus Homo?
(cogbooks 6.2)
a. Ardipithecus
b. Pan
c. Sahelanthropus
d. Australopithecus - ✔✔d
Which statement best explains why modern Europeans, Asians, or Africans
lack Denisovan DNA in their genome? (cogbooks 6.2)
a. Denisovans never interbred with any population of Homo sapiens.
b. Denisovans DNA was eliminated from those populations by strong
purifying selection.
c. Denisovans interbred only with the population whose ancestors are
Melanesians.
d. Neanderthal genes and Denisovan genes are incompatible, so modern
populations have one or the other. - ✔✔c
3
100% Pass Guarantee Katelyn Whitman, All Rights
, Which piece of evidence does not support the theory of recent (ca. 200,000
years ago) African origin of humans? (cogbooks 6.2)
a. Mitochondrial DNA sequences coalesce to Africa populations about
125,000 years ago.
b. Linkage disequilibrium of nuclear genes gets progressively lower as one
measures populations farther from Africa.
c. Haplotype diversity of nuclear genes is greatest in Africa
d. Fossils of modern humans older than 60,000 years are found only in
Africa.
e. Non-African populations show reduced heterozygosity compared to
African populations. - ✔✔b
Which statement is true? (lecture 22)
a. Tarsiers and lemurs are more closely related than tarsiers and new world
monkeys
b. Gibbons are more closely related to orangutans than humans
c. Gorillas are more closely related to orangutans than to humans
4
100% Pass Guarantee Katelyn Whitman, All Rights
